D2 protein (PsbD) forms the reaction core of PSII (Photosystem II) as a heterodimer with the D1 protein (PsbA). PsbD is homologous to the D1 protein, with slightly higher molecular mass of about 39,5 kDa. Accumulation of D2 protein is an important step in the assemply of the PSII reaction centre complex.This product is a recombinant protein standard, source Synechocystis strain PCC 6803.

Host

Clonality

Clone

Purity

Format

Lyophilized in glycerol

Quantity

250 µl

Reconstitution

For reconstitution add 225 ĩl of sterile water. Please notice that this product contains 10% glycerol and might appear as liquid but is provided lyophilized.

Storage

Store lyophilized/reconstituted at -20°C; once reconstituted make aliquots to avoid repeated freeze-thaw cycles. Please, remember to spin tubes briefly prior to opening them to avoid any losses that might occur from lyophilized material adhering to the cap or sides of the tubes.

The PsbD protein standard can be used in combination with global anti-PsbD antibodies to quantitate PsbD from a wide range of species. Global antibodies are raised against highly conserved amino acid sequences in the PsbD protein.

For most applications a sample load of 0.2 μg of chlorophyll will give a PsbD signal in this range.

Positive control: a 2 μl load per well is optimal for most chemiluminescent detection systems.

This standard is stabilized and ready and does not require heating before loading on the gel.

Please note that this product contains 10% glycerol and might appear as liquid but is provided lyophilized. Allow the product several minutes to solubilize after adding water. Mix thoroughly but gently Take extra care to mix thoroughly before each use, as the proteins tend to settle with the more dense layer after freezing.

Expected | apparent MW

In most gel systems PsbD migrates around 28-30 kDa

Confirmed reactivity

Predicted reactivity

Not reactive in

Additional information

Concentration: after adding 225 µl of milliQ water final concentration of the standard is 0.25 pmoles/ul

This standard is ready-to-load and does not require any additions or heating. It needs to be fully thawed and thoroughly mixed prior to using. Avoid vigorous vortexing, as buffers contain detergent. Following mixing, briefly pulse in a microcentrifuge to collect material from cap.

This standard is stabilized and ready and does not require heating before loading on the gel.

Please note that this product contains 10% glycerol and might appear as liquid but is provided lyophilized. Allow the product several minutes to solubilize after adding water. Mix thoroughly but gently Take extra care to mix thoroughly before each use, as the proteins tend to settle with the more dense layer after freezing.